RE: IDS, Linux and OOM killer
Posted in 2006
Philippe,
You are correct, onbar -w (whole) will run serially.
You said
The server is dedicated to IDS, and the problem occurs when onbar is
launched to backup the dbspaces. The backup process runs every night,
and the problem occurs about twice a month.
Are you absolutely certain the ONLY thing on this server is IDS?
Is there some type of cron (sorry, I'm not very linux knowledgeable so I speak solaris) or system activity or network that also happens twice a month?
It is indeed odd that every night the IDS onbar whole backup works fine except twice a month.
By any chance are you running something inside the DB engine twice a month.... some big stats job or some job that might make IDS save more in the temp area during the backup?
I can't help you from the o/s side.... but since you have "spikes" twice a month it would appear something different is happening on that server or IDS twice a month that is not normally happening....
I hope my "thinking" here will help you spot something.
Norma Jean Sebastian
ERP Support Administration
GIS- Enterprise Technical Services
-----Original Message-----
From: informix-list-bounces@iiug.org [mailto:informix-list-bounces@iiug.org] On Behalf Of philippe
Sent: Wednesday, November 22, 2006 9:11 AM
To: informix-list@iiug.org
Subject: Re: IDS, Linux and OOM killer
Sebastian, Norma J. avait écrit le 22/11/2006 :
> Hi Philippe,
>
> I know very little about linux, but if you can't fix it at the o/s
> level, maybe you can avoid it at the informix level.....
>
> If it only happens every now & then because of the onbar DB
> backup.....what are your onbar settings.... Maybe if you are running
> with BAR_MAX in $ONCONFIG set high (i.e. ours is 12) and it is normally
> ok except sometimes.... maybe bring it down a notch (i.e. in my case I
> would try 10).
>
> If you post your onbar $ONCONFIG settings the community here may have
> additional insight.
Sebastian,
Thank you for your answer.
Here are our Onbar settings: they come from onconfig.std file !
BAR_DEBUG 0
BAR_MAX_BACKUP 0
BAR_RETRY 1
BAR_NB_XPORT_COUNT 20
BAR_XFER_BUF_SIZE 31
RESTARTABLE_RESTORE ON
BAR_PROGRESS_FREQ 0
We perform whole system backup (onbar -w), so that the backup shoud be
processed serially even if BAR_MAX_BACKUP=0.
Philippe
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